THE MORNING CHRONICLE, ETC.--WHEN FIRST ESTABLISHED

It is read in the *Newspaper Directory* that *The Morning Chronicle* was established in 1770, *The Morning Herald* in 1781, *The Times*, 1st January, 1788. I believe that not one of these dates is correct, and that of *The Morning Herald* to be wrong by fifteen years or more. Can you, or any of the readers of "NOTES AND QUERIES," give me the exact dates, or tell me where I can find the earlier volumes; say, the first ten, or either or all?